Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
  • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
  • C07D307/79—Benzo [b] furans; Hydrogenated benzo [b] furans with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P11/00—Drugs for disorders of the respiratory system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P13/00—Drugs for disorders of the urinary system
  • A61P13/02—Drugs for disorders of the urinary system of urine or of the urinary tract, e.g. urine acidifiers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P15/00—Drugs for genital or sexual disorders; Contraceptives
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
  • A61P7/06—Antianaemics
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
  • C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
  • C07D209/04—Indoles; Hydrogenated indoles
  • C07D209/10—Indoles; Hydrogenated indoles with substituted hydrocarbon radicals attached to carbon atoms of the hetero ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
  • C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
  • C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
  • C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
  • C07D333/14—Radicals substituted by singly bound hetero atoms other than halogen
  • C07D333/18—Radicals substituted by singly bound hetero atoms other than halogen by sulfur atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
  • C07D495/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
  • C07D495/04—Ortho-condensed systems

Definitions

• This invention relates to methods of treating cyclooxygenase mediated diseases and certain pharmaceutical compositions therefor.
• Non-steroidal, antiinflammatory drugs exert most of their antiinflammatory, analgesic and antipyretic activity and inhibit hormone-induced uterine contractions and certain types of cancer growth through inhibition of prostaglandin G/H synthase, also known as cyclooxygenase.
• prostaglandin G/H synthase also known as cyclooxygenase.
• cyclooxygenase- 1 the constitutive enzyme, as originally identified in bovine seminal vesicles.
• the gene for a second inducible form of cyclooxygenase (cyclooxygenase-2) has been cloned, sequenced and characterized initially from chicken, murine and human sources.
• This enzyme is distinct from the cyclooxygenase- 1 which has been cloned, sequenced and characterized from various sources including the sheep, the mouse and man.
• the second form of cyclooxygenase, cyclooxygenase-2 is rapidly and readily inducible by a number of agents including mitogens, endotoxin, hormones, cytokines and growth factors.
• prostaglandins have both physiological and pathological roles, we have concluded that the constitutive enzyme, cyclooxygenase- 1 , is responsible, in large part, for endogenous basal release of prostaglandins and hence is important in their physiological functions such as the maintenance of gastrointestinal integrity and renal blood flow.
• cyclooxygenase-2 is mainly responsible for the pathological effects of prostaglandins where rapid induction of the enzyme would occur in response to such agents as inflammatory agents, hormones, growth factors, and cytokines.
• a selective inhibitor of cyclooxygenase-2 will have similar antiinflammatory, antipyretic and analgesic properties to a conventional non-steroidal antiinflammatory drug, and in addition would inhibit hormone-induced uterine contractions and have potential anti-cancer effects, but will have a diminished ability to induce some of the mechanism-based side effects.
• such a compound should have a reduced potential for gastrointestinal toxicity, a reduced potential for renal side effects, a reduced effect on bleeding times and possibly a lessened ability to induce asthma attacks in aspirin-sensitive asthmatic subjects.
• the invention encompasses the novel compound of Formula I as well as a method of treating cyclooxygenase-2 mediated diseases comprising administration to a patient in need of such treatment of a non-toxic therapeutically effective amount of a compound of Formula I.
• the invention also encompasses certain pharmaceutical compositions for treatment of cyclooxygenase-2 mediated diseases comprising compounds of Formula I. DETAILED DESCRIPTION OF THE INVENTION
• the invention encompasses the novel compound of Formula I as well as a method of treating cyclooxygenase-2 mediated diseases comprising administration to a patient in need of such treatment of a non-toxic therapeutically effective amount of a compound of Formula I.
• A-B-C-D- is selected from the group consisting of:
• Rl is selected from the group consisting of
• R2 is selected from the group consisting of (a) Cl-6alkyl,
• heteroaryl is a monocyclic aromatic ring of 5 atoms, said ring having one 1 letero atom which is S, O, or N, and optionally 1, 2, or 3 additional N atoms; or the heteroaryl is a monocyclic ring of 6 atoms, said ring having one hetero atom which is N, and optionally 1, 2, 3, or 4 additional N atoms; said substituents are selected from the group consisting of
• halo including fluoro, chloro, bromo and iodo
• R3 and R4 are the substituents residing on any position of
• NSAID non-steroidal anti-inflammatory drug
• PCC Pyridinium chlorochromate
• Ph phenyl
• PPA polyphosphoric acid r.t. r: room temperature
• Alkyl refers to linear or branched structures and combinations thereof.
• Halo includes F, Cl, Br, and I.
• Some of the compounds described herein contain one or more asymmetric centers and may thus give rise to diastereomers and optical isomers.
• the present invention is meant to comprehend such possible diastereomers as well as their racemic and resolved, enantiomerically pure forms and pharmaceutically acceptable salts thereof.
• Some of the compounds described herein contain olefinic double bonds, and unless specified otherwise, are meant to include both E and Z geometric isomers.
• compositions of the present invention comprise a compound of Formula I as an active ingredient or a pharmaceutically acceptable salt, thereof, and may also contain a pharmaceutically acceptable carrier and optionally other therapeutic ingredients.
• pharmaceutically acceptable salts refers to salts prepared from pharmaceutically acceptable non-toxic bases including inorganic bases and organic bases. Salts derived from inorganic bases include aluminum, ammonium, calcium, copper, ferric, ferrous, lithium, magnesium, manganic salts, manganous, potassium, sodium, zinc, and the like. Particularly preferred are the ammonium, calcium, magnesium, potassium, and sodium salts.
• Salts derived from pharmaceutically acceptable organic non-toxic bases include salts of primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines, such as arginine, betaine, caffeine, choline, N,N-dibenzylethylenediamine, diethylamine, 2-diethylaminoethanol, 2-dimethylaminoethanol, ethanolamine, ethylenediamine, N-ethylmorpholine, N-ethylpiperidine, glucamine, glucosamine, histidine, hydrabamine, isopropylamine, lysine, methylglucamine, morpholine, piperazine, piperidine, polyamine resins, procaine, purines, theobromine, triethylamine, trimethylamine, tripropylamine, tromethamine, and the like, and basic ion exchange resins.
• substituted amines including naturally occurring substituted
• the Compound of Formula I is useful for the relief of pain, fever and inflammation of a variety of conditions including rheumatic fever, symptoms associated with influenza or other viral infections, common cold, low back and neck pain, dysmenorrhea, headache, toothache, sprains and strains, myositis, neuralgia, synovitis, arthritis, including rheumatoid arthritis, degenerative joint diseases (osteoarthritis), gout and ankylosing spondylitis, bursitis, burns, injuries, following surgical and dental procedures.
• a compound may inhibit cellular neoplastic transformations and metastic tumor growth and hence can be used in the treatment of cancer.
• Compound I may also be of use in the treatment and/or prevention of cyclooxygenase-mediated proliferative disorders such as may occur in diabetic retinopathy and tumour angiogenesis.
• Compound I will also inhibit prostanoid-induced smooth muscle contraction by preventing the synthesis of contractile prostanoids and hence may be of use in the treatment of dysmenorrhea, premature labor, asthma, Alzheimer's Disease and osteoporosis.
• compound I By virtue of its high cyclooxygenase-2 (COX-2) activity and/or its specificity for cyclooxygenase-2 over cyclooxygenase- 1 (COX-1), compound I will prove useful as an alternative to conventional non-steroidal antiinflammatory drugs (NSAID'S) particularly where such non-steroidal antiinflammatory drugs may be contra-indicated such as in patients with peptic ulcers, gastritis, regional enteritis, ulcerative colitis, diverticulitis or with a recurrent history of gastrointestinal lesions; GI bleeding, coagulation disorders including anemia such as hypoprothrombinemia, haemophilia or other bleeding problems; kidney disease; those prior to surgery or taking anticoagulants.
• NSAID'S non-steroidal antiinflammatory drugs
• compositions for treating cyclooxygenase-2 mediated diseases as defined above comprising a non-toxic therapeutically effective amount of the compound of Formula I as defined above and one or more ingredients such as another pain reliever including acetominophen or phenacetin; a potentiator including caffeine; an H2-antagonist, aluminum or magnesium hydroxide, simethicone, a decongestant including phenylephrine, phenylpropanolamine, pseudoephedrine, oxymetazoline, epinephrine, naphazoline, xylometazoline, propylhexedrine, or levo- desoxyephedrine; an antiitussive including codeine, hydrocodone, caramiphen, carbetapentane, or
• the invention encompasses a method of treating cyclooxygenase mediated diseases comprising: administration to a patient in need of such treatment a non-toxic therapeutically effective amount of the compound of Formula I, optionally co-administered with one or more of such ingredients as listed immediately above.
• Compound I may be administered orally, topically, parenterally, by inhalation spray or rectally in dosage unit formulations containing conventional non-toxic pharmaceutically acceptable carriers, adjuvants and vehicles.
• parenteral as used herein includes subcutaneous injections, intravenous, intramuscular, intrasternal injection or infusion techniques.
• the compound of the invention is effective in the treatment of humans.
• compositions for treating cyclooxygenase-2 mediated diseases as defined may optionally include one or more ingredients as listed above.
• compositions containing the active ingredient may be in a form suitable for oral use, for example, as tablets, troches, lozenges, aqueous or oily suspensions, dispersible powders or granules, emulsions, hard or soft capsules, or syrups or elixirs.
• Compositions intended for oral use may be prepared according to any method known to the art for the manufacture of pharmaceutical compositions and such compositions may contain one or more agents selected from the group consisting of sweetening agents, flavoring agents, coloring agents and preserving agents in order to provide pharmaceutically elegant and palatable preparations. Tablets contain the active ingredient in admixture with non-toxic pharmaceutically acceptable excipients which are suitable for the manufacture of tablets.
• excipients may be for example, inert diluents, such as calcium carbonate, sodium carbonate, lactose, calcium phosphate or sodium phosphate; granulating and disintegrating agents, for example, corn starch, or alginic acid; binding agents, for example starch, gelatin or acacia, and lubricating agents, for example, magnesium stearate, stearic acid or talc.
• the tablets may be uncoated or they may be coated by known techniques to delay disintegration and absorption in the gastrointestinal tract and thereby provide a sustained action over a longer period.
• a time delay material such as glyceryl monostearate or glyceryl distearate may be employed. They may also be coated by the technique described in the U.S. Patent 4,256,108; 4,166,452; and 4,265,874 to form osmotic therapeutic tablets for control release.
• Formulations for oral use may also be presented as hard gelatin capsules wherein the active ingredient is mixed with an inert solid diluent, for example, calcium carbonate, calcium phosphate or kaolin, or as soft gelatin capsules wherein the active ingredients is mixed with water or an oil medium, for example peanut oil, liquid paraffin, or olive oil.
• an inert solid diluent for example, calcium carbonate, calcium phosphate or kaolin
• an oil medium for example peanut oil, liquid paraffin, or olive oil.
• Aqueous suspensions contain the active material in admixture with excipients suitable for the manufacture of aqueous suspensions.
• excipients are suspending agents, for example sodium carboxymethylcellulose, methylcellulose, hydroxy-propylmethy- cellulose, sodium alginate, polyvinyl-pyrrolidone, gum tragacanth and gum acacia; dispersing or wetting agents may be a naturally-occurring phosphatide, for example lecithin, or condensation products of an alkylene oxide with fatty acids, for example polyoxyethylene stearate, or condensation products of ethylene oxide with long chain aliphatic alcohols, for example heptadecaethylene-oxycetanol, or condensation products of ethylene oxide with partial esters derived from fatty acids and a hexitol such as polyoxyethylene sorbitol monooleate, or condensation products of ethylene oxide with partial esters derived from fatty acids and hexitol anhydrides, for example polyethylene
• the aqueous suspensions may also contain one or more preservatives, for example ethyl, or n-propyl, p-hydroxybenzoate, one or more coloring agents, one or more flavoring agents, and one or more sweetening agents, such as sucrose, saccharin or aspartame.
• Oily suspensions may be formulated by suspending the active ingredient in a vegetable oil, for example arachis oil, olive oil, sesame oil or coconut oil, or in mineral oil such as liquid paraffin.
• the oily suspensions may contain a thickening agent, for example beeswax, hard paraffin or cetyl alcohol. Sweetening agents such as those set forth above, and flavoring agents may be added to provide a palatable oral preparation. These compositions may be preserved by the addition of an anti-oxidant such as ascorbic acid.
• Dispersible powders and granules suitable for preparation of an aqueous suspension by the addition of water provide the active ingredient in admixture with a dispersing or wetting agent, suspending agent and one or more preservatives.
• a dispersing or wetting agent e.g., glycerol, glycerol, glycerol, glycerol, glycerol, glycerol, glycerin, glycerin, glycerin, glycerin, glycerin, sorbitol, sorbitol, sorbitol, sorbitol, sorbitol, sorbitol, sorbitol, sorbitol, sorbitol, sorbitol, glycerol, glycerol, glycerol, glycerol, glycerol, glycerol, glycerol, glycerol, glycerol
• the pharmaceutical compositions of the invention may also be in the form of an oil-in-water emulsions.
• the oily phase may be a vegetable oil, for example olive oil or arachis oil, or a mineral oil, for example liquid paraffin or mixtures of these.
• Suitable emulsifying agents may be naturally-occurring phosphatides, for example soy bean, lecithin, and esters or partial esters derived from fatty acids and hexitol anhydrides, for example sorbitan monooleate, and condensation products of the said partial esters with ethylene oxide, for example polyoxyethylene sorbitan monooleate.
• the emulsions may also contain sweetening and flavouring agents.
• Syrups and elixirs may be formulated with sweetening agents, for example glycerol, propylene glycol, sorbitol or sucrose. Such formulations may also contain a demulcent, a preservative and flavoring and coloring agents.
• the pharmaceutical compositions may be in the form of a sterile injectable aqueous or oleagenous suspension. This suspension may be formulated according to the known art using those suitable dispersing or wetting agents and suspending agents which have been mentioned above.
• the sterile injectable preparation may also be a sterile injectable solution or suspension in a non-toxic parenterally- acceptable diluent or solvent, for example as a solution in 1,3-butane diol.
• Suitable vehicles and solvents that may be employed are water, Ringer's solution and isotonic sodium chloride solution.
• sterile, fixed oils are conventionally employed as a solvent or suspending medium.
• any bland fixed oil may be employed including synthetic mono- or diglycerides.
• fatty acids such as oleic acid find use in the preparation of injectables.
• Compound I may also be administered in the form of a suppositories for rectal administration of the drug.
• These compositions can be prepared by mixing the drug with a suitable non-irritating excipient which is solid at ordinary temperatures but liquid at the rectal temperature and will therefore melt in the rectum to release the drug.
• a suitable non-irritating excipient which is solid at ordinary temperatures but liquid at the rectal temperature and will therefore melt in the rectum to release the drug.
• Such materials are cocoa butter and polyethylene glycols.
• creams, ointments, jellies, solutions or suspensions, etc., containing the compound of Formula I are employed. (For purposes of this application, topical application shall include mouth washes and gargles.)
• 140 mg/kg of body weight per day are useful in the treatment of the above-indicated conditions, or alternatively about 0.5 mg to about 7 g per patient per day.
• inflammation may be effectively treated by the administration of from about 0.01 to 50 mg of the compound per kilogram of body weight per day, or alternatively about 0.5 mg to about 3.5 g per patient per day.
• the amount of active ingredient that may be combined with the carrier materials to produce a single dosage form will vary depending upon the host treated and the particular mode of administration.
• a formulation intended for the oral administration of humans may contain from 0.5 mg to 5 g of active agent compounded with an appropriate and convenient amount of carrier material which may vary from about 5 to about 95 percent of the total composition.
• Dosage unit forms will generally contain between from about 1 mg to about 500 mg of an active ingredient, typically 25 mg, 50 mg, 100 mg, 200 mg, 300 mg, 400 mg, 500 mg, 600 mg, 800 mg, or 1000 mg.
• the compounds of the present invention can be prepared according to the following methods. Method A
• Reaction of the readily available aldehyde XV with an organometallic reagent XVI provides allylic alcohol XVII, which can be oxidized to ketone XVIII by an oxidizing agent such as PDC, PCC, Mn ⁇ 2 or Swern's reagent.
• a peracid derivative can be used to convert XVIII to methyl sulphone XIX, which is converted to thiophene XX upon treatment with methyl thioglycolate and a base, such as a tertiary amine.
• Benzylic bromination of XX with NBS provides bromide XXI.
• Method D The difference between Method D and Method E is that the methylsulfonyl group is introduced at the end of the synthetic sequence in E.
• XXIV could be transformed to thiophene derivative XXVII. Oxidation of XXVII with peracid provides the desired compound XXIII.
• Table I and II illustrate compounds of Formula I, which are representative of the present invention.
• the compound of Formula I can be tested using the following assays to determine their cyclooxygenase-2 inhibiting and antiinflammatory activities.
• mice Male Sprague-Dawley rats (150-200 g) were fasted overnight and were given p.o. either vehicle (1% methocel) or a test compound. One hr later, a line was drawn using a permanent marker at the level above the ankle in one hind paw to define the area of the paw to be monitored. The paw volume (Vo) was measured using a plethysmometer (Ugo-Basile, Italy) based on the principle of water displacement. The animals were then injected subplantarly with 50 ⁇ l of 1 % carrageenan solution in saline (FMC Corp, Maine) into the paw using an insulin syringe with a 25-gauge needle (i.e.
• Compounds of the present invention are inhibitors of cyclooxygenase-2 and are thereby useful in the treatment of cyclooxygenase-2 mediated diseases as enumerated above.
• the activities of the compounds against cyclooxygenase may be seen in the representative results shown below.
• inhibition is determined by measuring the amount of prostaglandin E2 (PGE2) synthesized in the presence of arachidonic acid, cyclooxygenase- 1 or cyclooxygenase-2 and a putative inhibitor.
• PGE2 prostaglandin E2
• the IC50 values represent the concentration of putative inhibitor required to return PGE2 synthesis to 50% of that obtained as compared to the uninhibited control.
• a compound is a selective inhibitor of COX-2 over COX-1 if the ratio of IC50's for COX-1 : COX-2 is 100 or greater, preferably 500 or greater.
• melting points are uncorrected and d' indicates decomposition; the melting points given are those obtained for the materials prepared as described; polymorphism may result in isolation of materials with different melting points in some preparations;
• NMR data when given, NMR data is in the form of delta ( ⁇ ) values for major diagnostic protons, given in parts per million (ppm) relative to tetramethylsilane (TMS), determined at 300
• Step 1 2-phenoxy- 1 -(4-(methylthio)phenyl)ethanone
• Step 5 3-(4-(Methanesulfonyl)phenyl -2-phenylbenzorblfuran
• Step 1 2-phenylthio- 1 -(4-(methanesulfonyl)phenyl)ethanone To a solution of thiophenol (5.5 g) and 2-bromo-l-(4-
• Step 2 3-(4-(Methanesulfonyl)phenyl benzorblthiophene 2- ⁇ henylthio-l-(4-(methanesulfonyl)phenyl)ethanone (1 g) from Step 1 was mixed with PPA (10 g) and heated at 80°C for 30 minutes. The mixture was then cooled in an ice-water bath and ice was added. The aqueous was extracted twice with EtOAc. The organic layers were combined, washed with brine, dried over MgS ⁇ 4, filtered and the solvent evaporated in vacuo. Purification by silica gel chromatography using 30% EtOAc in hexane afforded 150 mg of the tide compound.
• Step 4 3-(4-(Methanesulfonyl)phenyl -2-phenylbenzorblthiophene
• Step 1 3-(4-(Methylthio)phenyl)-2-phenylinden- 1 -one
• Step 2 3-(4-(Methanesulfonyl)phenyl)-2-phenylinden- 1 -one
• Step 1 l-(4-Fluorophenyl)-2-(4-(methylthio)phenyl)ethanone
• Step 2 l-(4-Fluorophenyl)-2-(4-(methylsulfonyl)phenyl)ethanone
• Step 1 To a solution of l-(4-fluorophenyl)-2-(4-(methylthio)- phenyl ethanone from Example 4, Step 1 (2.50 g) in 1 ,2-dichloroethane (27.0 mL) were introduced the Vilsmeier reagent (Aldrich catalog,
• Step 2 cis,trans-4-Chloro-4-(4-fluorophenyl)-3-(4-(methylthio)- phenyl)-3-buten-2-ol
• Step 3 . cis,trans-4-Chloro-4-(4-fluorophenyl)-3-(4-(methylthio)- phenyl)-3-buten-2-one
• a solution of the product of Step 2 200 mg
• a solution of the product of Step 2 200 mg
• a solution of the product of Step 2 200 mg
• a solution of the product of Step 2 200 mg
• a solution of the product of Step 2 200 mg
• PDC 0.5 g of powered 4 A molecular sieve and 0.47 g of PDC.
• the mixture was stirred for 2 h, diluted with 15 mL of Et2 ⁇ , and then filtered through a pad of celite.
• the filtrate was concentrated in vacuo to give 180 mg of the crude title compound which was used for the next step without further purification.
• Step 4 cis,trans-4-Chloro-4-(4-fluorophenyl)-3-(4-(methyl- sulfonyl)phenyl)-3-buten-2-one
• the crude product of Step 3 (180 mg) was dissolved in 10 mL of 10: 1 CH2Cl2/MeOH and treated with 250 mg of MPPM. After stirring for 30 min, the reaction mixture was quenched with 20 mL of sat. NaHC03, and extracted with 50 ml of EtOAc. The extract was dried over Na2S04 and concentrated in vacuo to give 150 mg of the title compound.
• Step 5 3-Methyl-5-(4-fluorophenyl)-4-(4-(methylsulfonyl)- phenyl)thiophene-2-carboxylic acid methyl ester
• methyl thioglycolate 42 uL
• Step 6 3-Bromomethyl-5-(4-fluorophenyl)-4-(4-(methylsulfonyl)- phenyl)thiophene-2-carboxylic acid methyl ester
• Step 7 3-Hydroxymethyl-5-(4-fluorophenyl)-4-(4- (methylsulfonyl)phenyl)thiophene-2-carboxylic acid
• Step 8 2-(4-Fluorophenyl)-3-(4-(methylsulfonyl)phenyl)-4H- thienor2.3-clfuran-6-one
• Example 6 Following the procedure of Example 6, but replacing l-(4- fluorophenyl)-2-(4-(methylthio)phenyl)ethanone by l-(3,4- difluorophenyl)-2-(4-(methylthio)phenyl)ethanone, the title compound was prepared.
• the starting ketone was prepared according to Example 4, step 1, beginning with 3,4-difluorobenzaldehyde.
• Step 1 3-Methyl-5-(4-fluorophenyl)-4-(4-(methylthiophenyl)- thiophene-2-carboxylic acid methyl ester
• Step 2 3-Bromomethyl-5-(4-fluorophenyl)-4-(4-(methylthio) phenyl)thiophene-2-carboxylic acid methyl ester
• Step 3 3-Hydroxymethyl-5-(4-fluorophenyl)-4-(4-(methylthio)- phenyl thiophene-2-carboxylic acid
• Step 5 2-(4-Fluorophenyl)-3-(4-(methylsulfinyl) ⁇ henyl)-4H- thieno 2,3-c]furan-6-one 2-(4-Fluorophenyl)-3-(4-(methylthio)phenyl)-4H-thieno-
• [2,3-c]furan-6-one (548 mg) (from Step 4) was dissolved in 10 mL of 10: 1 CH2Cl2/-MeOH and treated with 476 mg of MPPM at 0°C. After stirring for 15 min at 0°C and 1.5 h at room temperature, the reaction mixture was quenched with 20 mL of sat. NaHC03, and extracted with 50 ml of EtOAc. The extract was dried over MgS ⁇ 4 and concentrated in vacuo. The residue was purified by silica gel chromatography eluted with EtOAc to give 490 mg of the title compound.
• Step 6 2-(4-Fluorophenyl)-3-(4-(aminosulfonyl)phenyl)-4H- thienor2.3-c1furan-6-one
• Step 1 3-Cyanomethyl-4-(4-(methylthio)phenyl)-5-phenyl- thiophene-2-carboxylic acid methyl ester
• 3-bromomethyl-4-(4-(methylthio)phenyl)-5-phenyl- thiophene-2-carboxylic acid methyl ester ( 1 g, prepared by using the same procedure described for 3-bromomethyl-5-(fluorophenyl)-4-(4- (methylthio)phenyl)thiophene-2-carboxylic acid methyl ester of Example 8, Step 2 but substituting benzaldehyde for 4-fluorobenz- aldehyde) in DMSO (25 mL) in an ice bath was added powdered KCN.
• Step 2 [2-Hydroxymethyl-4-(4-(methylthio)phenyl)-5-phenylthio- phen-3-yllacetonitrile To a solution of 3-cyanomethyl-4-(4-(methylthio)phenyl)-
• Step 4 3-(4-(Methylthio)phenyl)-2-phenyl-4,7-dihydrothieno- l " 2.3-c1pyran-5-one
• Step 5 3-(4-(Methylsulfonyl)phenyl)-2-phenyl-4,7-dihydro- thienor2.3-clpyran-5-one
• a solution of 3-(4-(methylthio)phenyl)-2-phenyl-4,7- dihydrothieno[2,3-c]pyran-5-one (100 mg) and MPPM, (166 mg) in CH2CI2 (5 mL) and MeOH (1 mL) was stirred overnight.
• a solution of saturated NaHC ⁇ 3 was added to the reaction mixture which was extracted with EtOAc. The extract was washed with brine, dried over MgS04, filtered and the solvent was evaporated under vacuum.
• Step 1 l-(4-(methylthio)phenyl)-2-phenylethanone
• Step 2 2-(4-(Methylthio)phenyl)-3-phenyl-4H-thieno[2,3-c]furan- 6-one
• the title compound was prepared from l-(4-(methylthio)- phenyl)-2-phenylethanone by the procedures described in Steps 1, 2, 3,
• Step 3 2-(4-(Methylsulfonyl)phenyl)-3-phenyl-4H-thieno[2,3-c]- furan-6-one

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